I used to look after a garden which did that. The clients used to tip pea shingle into the cracks . Not to help now, but did wonders for winter drainage problems
@MrMow I thought that sounded like a good idea too although I had never heard of it. It also makes it safer too.
Sometimes its all about timing and using it for your benefit, cracks and Fissures are very useful on heavy soil as it can help with drainage later in the year. As Hosta implied.
Another benefit is to apply some seaweed. some of the specialist drainage companies will inject seaweed as they go. Some use Gypsum.
Our clay lawn hasn't shown this thankfully but our veg area certainly has. We have been here since 1978 and added and added and......compost to our veg area. You would think that we had done nothing. The areas show cracks that you can get you hand down. Try digging? You need a something that will tackle concrete. Yes we need rain. Watering even with our grey water does no good.
I remember several years ago,as an experiment, letting the hose run into a crack for a very long time. The water just disappeared. There's not a lot you can do. Drainage isn't a problem in my garden so there doesn't seem much point in filling the cracks with gravel. The flower beds don't crack , I suppose I've improved the soil over the years but there's nothing I can or am willing to do with the grass. I actually like the yellow weeds that are flowering there.
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Another benefit is to apply some seaweed. some of the specialist drainage companies will inject seaweed as they go. Some use Gypsum.